automount: never consider our own mount point a prefix mount of us

fixme

@@ -65,7 +65,8 @@
 
 * teach dbus to talk to systemd when autospawning services
 
-* unix sockets chown()/chgrp()
+* Figure out which signal handlers we actually have to reset in the
+  forked off child
 
 Regularly:
 

src/automount.c

@@ -59,6 +59,8 @@ static void repeat_unmout(const char *path) {
         assert(path);
 
         for (;;) {
+                /* If there are multiple mounts on a mount point, this
+                 * removes them all */
 
                 if (umount2(path, MNT_DETACH) >= 0)
                         continue;
@@ -118,6 +120,9 @@ int automount_add_one_mount_link(Automount *a, Mount *m) {
         if (!path_startswith(a->where, m->where))
                 return 0;
 
+        if (path_equal(a->where, m->where))
+                return 0;
+
         if ((r = unit_add_dependency(UNIT(m), UNIT_BEFORE, UNIT(a), true)) < 0)
                 return r;